Q: Thumping sounds while driving over sharp bumps

asked by on

I have a high-mileage car with approximately 150,000 miles on it. It has an automatic transmission. It's been making some noises in the front end of the car on the left side. These thumping sounds occur when I hit a sharp bump during driving. Bumps are not the issue, but only sharp ones would cause the noise. At the shop, they had the struts replaced as they thought that was making the noise. It didn't help however. The noise can be heard only from the inside of the car. I went to the dealer and had the strut bushings and top links replaced, as they were bad. I had the alignment checked as well. It was fine. I checked every part I could, including bolts and lower ball joints as well as the exhaust. There are no loose parts either. The car steering is fine. The sound is still noticeable. Besides sharp bumps, the sound is also heard if I drive slowly over a sharp speed bump, making the noise at the end of the speed bump. It sounds like something heavy. Do you have any idea what could be making this thumping noise? Thanks.

The only part you did not mention (and the most likely cause of the problem) is the inside lower control arm bushings are bad. I would also check the steering gear mount bushings for excessive wear. Both of these bushings would be felt through the floor when hitting bumps. Have the bushings and lower ball joint checked for any looseness or rubber cracks and replace as needed. A certified mobile mechanic from YourMechanic can diagnose and repair these problems as needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Thumping sounds while driving over sharp bumps

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car sounding weird after engine fire

I wouldn't recommend driving the vehicle until you have the car checked by a professional. Engine fires can be caused for many different reasons, and leave damage to several components of the car. With all of these issues, I would...

Q: Question on fixing Ford Focus AC

If the kit consists of a compressor, clutch, system dryer, system oil, o-rings, and refrigerant, then all of that is essential. If parts other than that just listed are included, those other parts would have to have been separately diagnosed...

Q: I just wanted to buy the oil pan gasket for a 2000 honda accord v6 3.0. Can you tell me what you charge?

Billing question sent to CS for the cost of replacing the oil pan gasket and parts.

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...